Abstract
This paper sets out a procedure for the analysis of piled raft foundation systems. It is based on an elastic formulation initially, but makes approximate allowances for non-linear raft behaviour by imposing an upper limit on the contact pressure between the raft and the underlying soil, and for nonlinear pile behaviour by assuming that the pile behaviour can be characterized by a hyperbolic load-settlement curve. It also makes approximate allowances for the various components of interaction within the foundation system. Examples are given to demonstrate the importance of taking non-linearity and pile-raft interaction into account with respect to settlement, differential settlement, pile load distribution and raft bending moments.
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